Category: Electric vehicle supply equipment
Issue date:
Effective date:
Revision number: N/A
Supersedes: N/A
Table of contents
- 1.0 Scope
- 2.0 Authority
- 3.0 References
- 4.0 Definitions
- 5.0 Administrative
- 6.0 Technical
- 7.0 Metrological requirements
1.0 Scope
These specifications apply to all Level 1 and Level 2 electric vehicle supply equipment (EVSE) submitted for type approval by December 31, 2024.
These specifications apply to EVSE that are capable of measuring the amount of alternating current (AC) flowing between the EVSE and an electric vehicle (EV) and that are used in discrete transaction-based, public-use applications.
These specifications do not apply to EVSE that establish a charge for electricity supplied solely on the basis of time, without regard for the amount of supplied electricity, or to features of EVSE that establish a charge for services (e.g. vehicle parking) based on time measurements.
These specifications are to be applied in accordance with the requirements of bulletin EVSE-01.
2.0 Authority
These specifications are issued under the authority of section 12 of the Electricity and Gas Inspection Regulations.
3.0 References
- Electricity and Gas Inspection Regulations
- EVSE-01—Phased Approach to the Type Approval of Electric Vehicle Supply Equipment
- S-E-EVSE-01—Specifications for the Approval of Type of Electric Vehicle Supply Equipment
- P-E-EVSE-01—Procedures Applicable to Specifications for the Approval of Type of Electric Vehicle Supply Equipment
- S-EG-05—Specifications for the Approval of Software Controlled Electricity and Gas Metering Devices
- S-EG-06—Specifications Relating to Event Loggers for Electricity and Gas Metering Devices
- OIML (International Organization of Legal Metrology) D 31 (2023) General Requirements for Software Controlled Measuring Instruments
- OIML D 11 (2013) General Requirements for Electronic Measuring Instruments
- OIML International Recommendation R 46 (2012) Active Electrical Energy Meters
4.0 Definitions
All definitions found in section 4.0 of S-E-EVSE-01 apply to these provisional specifications.
5.0 Administrative
The administrative requirements found in section 5.0 of S-E-EVSE-01 apply to these provisional specifications.
6.0 Technical
The technical requirements found in section 6.0 S-E-EVSE-01 apply to these provisional specifications.
7.0 Metrological requirements
7.1 Units of measurement
The requirements of section 7.1 of S-E-EVSE-01 apply to these provisional specifications.
7.2 Rated operating conditions
Rated operating conditions are specified in Table 1.
| Condition or influence quantity | Values, Ranges |
|---|---|
| Frequency | 0.95 f nom ≤ f ≤1.05 f nom |
| Voltage | For each Unom, 0.9 times lowest Unom to 1.1 times highest Unom |
| Current |
|
| Power factor | ≥0.9 |
| Temperature |
|
| Humidity and water |
With respect to humidity, the manufacturer must specify the environment class for which the system is intended:
|
| Harmonics | The EVSE must operate properly when the supply voltage distortion is less than 10% and load current distortion is less than 3% at all harmonics indices. |
| Load balance | All loads must be balanced. |
| Minimum measured quantity (MMQ) | The MMQ must not be greater than 0.1 kWh. If no MMQ is marked, the maximum value will be assumed. |
7.3 Performance requirements
7.3.1 General
Values indicated or stored in memory must not be affected by electrical, mechanical or temperature variations, radio-frequency interference, power failure or any other environmental influences to the extent that accuracy is impaired.
All delivered energy registration must reflect the energy delivered to the EV at the point of connection to the vehicle or to a customer connected supplied cable, and must not include any energy consumed by the EVSE, its cables or associated components.
All received energy registration must reflect the energy received from the EV at the point of connection to the vehicle or to a customer connected supplied cable, and must not include any energy consumed by the EVSE, its cables or associated components.
7.4 Repeatability
When the EVSE is subject to multiple test loads conducted at the same load condition, the errors must be within 0.25% of each other and no result can exceed the maximum permissible error. Repeatability tests must be performed for a minimum of three consecutive runs.
7.5 Starting current (Ist)
The EVSE must start and continue to register with a load current of Ist defined in Table 1 above.
7.6 Maximum permissible errors
EVSE errors of registration at reference conditions must not exceed the values given in Table 2 below.
| Current range | Power factor | Maximum permissible error |
|---|---|---|
| I st ≤ I < I min | >0.9 | ±15% |
| I min ≤ I < I tr | >0.9 | ±1.5% |
| I tr ≤ I ≤ I max | >0.9 | ±1.0% |
For devices that do not detent reverse energy flow, the maximum permissible errors are applicable for forward and reverse energy flow.
7.6.1 Influence quantities
Test conditions and procedures for influence quantities are provided in P-E-EVSE-01.
7.6.1.1 Temperature
The temperature coefficient of the EVSE must fulfill the requirements of Table 3 when the EVSE is otherwise operated at reference conditions.
| Influence quantity | Limit for temperature coefficient of error (%/K) |
|---|---|
| Temperature coefficient (c), over any interval of the temperature range, which is not less than 15 K and not greater than 23 K, for current I tr ≤ I ≤ I max | 0.05% |
7.6.1.2 Error shift limits for influence quantities
When the load current is held constant at a point within the rated operating range with the EVSE otherwise operated at reference conditions, and when any single influence quantity is varied from its value at reference conditions to its extreme values given in Table 4, the maximum percent error shift must not exceed the value given in Table 4 for the influence quantity. The EVSE must continue to function after the application of an influence quantity.
| Influence quantity | Conditions | Current | Maximum permissible error shift |
|---|---|---|---|
| Self-heating | Continuous current at I max | I max | ±0.5% |
| Voltage variation | 0.9 times lowest U nom to 1.1 times highest U nom This requirement is also applicable to any auxiliary supply voltage, which can also be varied by up to ±10% of the nominal value. |
I tr ≤ I ≤ I max | ±0.7% |
| Frequency variation | f nom ±5% The frequency of the auxiliary supply voltage, if applicable, must be varied simultaneously with the main supply voltage. |
I tr ≤ I ≤ I max | ±0.5% |
| Harmonics in voltage and current circuitsFootnote 1 | d < 5% I d < 10% U |
I tr ≤ I ≤ I max | ±0.6% |
| Reversed phase sequence (3-phase only) | Any two phases interchanged | I tr ≤ I ≤ I max | ±1.5% |
| Operation of ancillary devices | Ancillary devices operated with I = I tr and I max | I tr ≤ I ≤ I max | ±0.33% |
7.6.1.3 Effects of disturbances
Test conditions and procedures for disturbances are provided in P-E-EVSE-01.
The EVSE must withstand disturbances that may be encountered under conditions of normal use. When subjected to the disturbances listed in Table 5 and Table 6, the EVSE must not exhibit an error shift greater than ±1.0% or where indicated must not exhibit any damage to the EVSE.
Electrical disturbances
| Disturbance quantity | Level of disturbance | Allowed effects or error shift |
|---|---|---|
| Electrostatic discharges |
|
±1.0% |
Environmental disturbances
| Disturbance quantity | Level of disturbance | Allowed effects or error shift |
|---|---|---|
| Dry heat | One standard temperature higher than upper specified temperature limit, 2 h | ±1.0% |
| Cold | One standard temperature lower than lower specified temperature limit, 2 h | ±1.0% |
| Damp heat |
|
No evidence of any mechanical damage or corrosion |